Mixer tap cartridge with adjustable flowrate limitation

Abstract

A mixer tap cartridge including a body (10) having a bush (23) with a reference axis, internal flowrate adjustment members disposed inside the body and a lever (20) cooperating with these internal members to adjust the flowrate hinged to the bush (23) about a transverse pin (24) and having an exterior part (21) projecting out of the body, the lever and the bush having complementary bearing surfaces (25, 26) conjointly defining an extreme flowrate configuration of the lever, characterised in that the bearing surface (25) of the lever is part of a projecting portion of a pin (27) sliding in a transverse hole (28) in the lever, this pin cooperating with an adjustment member (31) mobile in a housing (30) in the lever accessible from outside the cartridge.

I claim: 
     
       1. A mixer tap cartridge comprising a body having a bush defining a reference axis, internal flowrate adjustment members disposed inside the body and a lever cooperating with the internal flowrate adjustment members to adjust the flowrate, the lever hinged to the bush about a transverse pin and having an exterior part projecting out of the body, the lever and the bush each having complimentary bearing surfaces conjointly defining an extreme flowrate configuration of the lever, wherein the bearing surface of the lever is part of a projecting portion of a pin sliding in a transverse hole in the lever, the pin cooperating with a mobile adjustment member mobile in a housing in the lever accessible from outside the cartridge.   
     
     
       2. The cartridge according to claim 1, wherein the pin includes a ramp inclined relative to the longitudinal axis of the housing in the lever, the housing having a non-zero inclination relative to the direction of the transverse hole. 
     
     
       3. The cartridge according to claim 2, wherein the housing is at least approximately longitudinal. 
     
     
       4. The cartridge according to claim 2, wherein the housing is bored and the mobile adjustment member is a screw. 
     
     
       5. The cartridge according to claim 4, wherein the screw has a frustoconical end defining a cone angle substantially equal to the inclination of the inclined ramp relative to the longitudinal axis of the housing in the lever. 
     
     
       6. The cartridge according to claim 4 wherein the housing of the adjustment member extends a bored housing in the end of the lever. 
     
     
       7. The cartridge according to claim 1, wherein the transverse hole is formed in the lever between the transverse pin and the end of the lever. 
     
     
       8. The cartridge according to claim 1, wherein the pin has a non-circular cross section. 
     
     
       9. The cartridge according to claim 1, wherein the pin has a polygonal cross section. 
     
     
       10. The cartridge according to claim 9, wherein the pin has a substantially rectangular cross section, the greatest distance of which is perpendicular to the longitudinal axis of the lever. 
     
     
       11. The cartridge according to claim 1, wherein the projecting portion of the pin is convex. 
     
     
       12. The cartridge according to claim 11, wherein the projecting portion of the pin is part of a cylinder transverse to the longitudinal axis of the lever.